SN74CBT34X245 Series

5-V, 32-channel FET bus switch for partial-power-down applications with up to 4 control inputs

Catalog

5-V, 32-channel FET bus switch for partial-power-down applications with up to 4 control inputs

Part	Independent Circuits	Type	Circuit [custom]	Circuit [custom]	Voltage Supply Source	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Voltage - Supply [Min]	Voltage - Supply [Max]	Package / Case	Package / Case [y]	Package / Case [x]	Supplier Device Package
Texas Instruments SN74CBT34X245DBBR	4	Bus Switch	8	1:1	Single Supply	85 °C	-40 °C	Surface Mount	4.5 V	5.5 V	80-TFSOP	6.1 mm	0.24 in	80-TSSOP

Catalog

5-V, 32-channel FET bus switch for partial-power-down applications with up to 4 control inputs

Key Features

• Member of Texas Instruments' Widebus+™ Family5-Switch Connection Between Two PortsTTL-Compatible Input LevelsFlow-Through Architecture Optimizes PCB LayoutIoffSupports Partial-Power-Down Mode OperationLatch-Up Performance Exceeds 100 mA Per JESD 78, Class IIESD Protection Exceeds JESD 222000-V Human-Body Model (A114-A)200-V Machine Model (A115-A)1000-V Charged-Device Model (C101)Widebus+ is a trademark of Texas Instruments.Member of Texas Instruments' Widebus+™ Family5-Switch Connection Between Two PortsTTL-Compatible Input LevelsFlow-Through Architecture Optimizes PCB LayoutIoffSupports Partial-Power-Down Mode OperationLatch-Up Performance Exceeds 100 mA Per JESD 78, Class IIESD Protection Exceeds JESD 222000-V Human-Body Model (A114-A)200-V Machine Model (A115-A)1000-V Charged-Device Model (C101)Widebus+ is a trademark of Texas Instruments.

Description

The SN74CBT34X245 provides 32 bits of high-speed TTL-compatible bus switching. The low on-state resistance of the switch allows connections to be made with minimal propagation delay. The device is organized as four 8-bit bus switches, two 16-bit bus switches, or one 32-bit bus switch. When output enable (OE\) is low, the switch is on, and port A is connected to port B. When OE\ is high, the switch is open, and the high-impedance state exists between the two ports. This device is fully specified for partial-power-down applications using Ioff. The Ioffcircuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The SN74CBT34X245 provides 32 bits of high-speed TTL-compatible bus switching. The low on-state resistance of the switch allows connections to be made with minimal propagation delay. The device is organized as four 8-bit bus switches, two 16-bit bus switches, or one 32-bit bus switch. When output enable (OE\) is low, the switch is on, and port A is connected to port B. When OE\ is high, the switch is open, and the high-impedance state exists between the two ports. This device is fully specified for partial-power-down applications using Ioff. The Ioffcircuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.